Feeling something blocking in the throat all the time may be an early manifestation of cancer, which should be taken seriously and go to hospital for examination as soon as possible to make a clear diagnosis. It is called choking sensation or esophageal foreign body sensation when eating. This is the early clinical manifestation of esophageal cancer because the muscle tissue of esophagus is eroded by cancer cells and peristalsis becomes poor, resulting in the obstruction of food passing through the esophagus after eating. Besides, benign diseases such as reflux esophagitis and esophageal ulcer may also cause choking or foreign body sensation in the esophagus, and these diseases are precancerous and have a higher chance of malignant transformation. In addition, early stage of laryngeal cancer may also cause foreign body sensation in the throat and poor swallowing when eating. Therefore, if you feel something blocking in your throat all the time, you should be alert to the possibility of early esophageal cancer and laryngeal cancer, but it may also be caused by benign diseases such as pharyngitis and esophagitis, no matter what, you should pay attention to it and seek medical treatment in time.